Question: All persons running for public office must report the amounts

All persons running for public office must report the amounts of money spent during their campaigns. Political scientists have contended that female candidates generally find it difficult to raise money and therefore spend less in their campaigns than do male candidates. Suppose the ­accompanying data represent the campaign expenditures of a randomly selected group of 20 male and 20 female candidates for the state legislature. Do the data support the claim that female candidates generally spend less in their campaigns for public office than do male candidates?
Campaign Expenditures (in thousands of dollars)

a. Estimate the size of the difference in the mean campaign expenditures between female and male candidates using a 95% confidence interval.
b. Is there a significant difference at the .05 level in the mean campaign expenditures between female and male candidates?
c. Is there a practical difference in the mean campaign expenditures between female and male candidates?
d. Are the conditions necessary to analyze the data using the t test to satisfied?